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<?php declare(strict_types=1);
/**
* ZSTD compressor using FFI and libzstd
* PoC, only for documentation purpose
*
* Copyright (c) 2019 Remi Collet
* License: CC-BY-SA
* http://creativecommons.org/licenses/by-sa/4.0/
*/
if (PHP_VERSION_ID < 70400 || !extension_loaded("ffi")) {
die("PHP 7.4 with FFI required\n");
}
if (PHP_SAPI != "cli") {
Header('Content-Type: text/plain');
}
printf("PHP version %s\n", PHP_VERSION);
if (PHP_SAPI == "cli" && !class_exists("\\Remi\\Zstd")) {
printf("Fallback on manual load\n");
require_once __DIR__ . '/preload-zstd.inc';
} else {
printf("Use preloaded class\n");
}
if (class_exists("\\Remi\\Zstd")) {
$t = microtime(true);
$src = file_get_contents(PHP_BINARY);
$comp = \Remi\Zstd::compress($src);
printf("\nSrc length = %d\n", \strlen($src));
printf("ZSTD_compress = %d\n", \strlen($comp));
file_put_contents("/tmp/testffi.zstd", $comp);
$comp = file_get_contents("/tmp/testffi.zstd");
$out = \Remi\Zstd::decompress($comp);
printf("Src length = %d\n", \strlen($comp));
printf("ZSTD_decompress = %d\n", \strlen($out));
file_put_contents("/tmp/testffi.orig", $out);
printf("Check = %s\n", $src === $out ? "OK" : "KO");
$t = microtime(true) - $t;
printf("Using FFI extension = %.3f\"\n\n", $t);
} else {
printf("\\Remi\\Zstd missing\n\n");
}
if (extension_loaded("zstd")) {
$t = microtime(true);
$src = file_get_contents(PHP_BINARY);
$len = strlen($src);
printf("Src length = %d\n", $len);
$comp = zstd_compress($src, 6);
$clen = strlen($comp);
printf("ZSTD_compress = %d\n", $clen);
$comp = substr($comp, 0, $clen);
file_put_contents("/tmp/testzstd.zstd", $comp);
$comp = file_get_contents("/tmp/testzstd.zstd");
printf("Src length = %d\n", \strlen($comp));
$unco = zstd_uncompress($comp);
$ulen = strlen($unco);
printf("ZSTD_decompress = %d\n", $ulen);
file_put_contents("/tmp/testzstd.orig", $unco);
printf("Check = %s\n", $src === $unco ? "OK" : "KO");
$t = microtime(true) - $t;
printf("Using ZSTD extension = %.3f\"\n\n", $t);
} else {
printf("ZSTD missing\n\n");
}
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